The younger, more serious and logical brother of the Twilight Detective Agency gargoyles, Hawkstone is a big monster in a small, fragile human world. Deep and witty if not wise, he and his brother Riverdale seek to know the world of humanity better by living in it, though they must do it secretly.

The older brother of the Twilight Detective Agency duo, Riverdale channels his passion to help humanity while wondering all the while what it's like to BE human.
Riverdale loves sunshine! Riverdale loves pants and music too! Riverdale very sensitive! He speaks right from the heart. Riverdale loves youuuu! (To the tune of "Code Monkey" by Jonathan Coulton)